Patent US4707746A successfully refreshed from Google Patents.
US4707746A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Projection television receiver with a retractable reflector
Assignee: NEC Home Electronics Ltd
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Filing: 1986-08-25
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Granted: 1987-11-17
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Expires: 2006-08-25
Abstract
Abstract A projection television receiver using a reflector between a projection tube and a screen. The reflector is attached to a rear cover of the cabinet which is rotatable between a retracted and projected position. In the retracted position, the receiver is compact and easily shipped while the projected position is required during operation.
Inventors
- 👤 Shunji Nishikawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 23:42
CPC Classifications
H; H04; H04N; H04N9/00; H04N9/12; H04N9/31; H04N9/3141
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
260 words
A video signal projection device, comprising: a projection tube (1) for projecting an image contained in a video signal; a screen (5) having a first surface onto which said image is projected and a second surface facing in a direction opposite to said first surface for visibly displaying said image for a viewer to observe; a reflector (4) for reflecting said projected image onto said first surface of said screen; a generally rectangular cabinet (6) for containing said projection tube, said cabinet having a first longitudinal side for supporting said screen and a second longitudinal side in which an opening is provided, said second longitudinal side being opposite to said first longitudinal side and being spaced a predetermined distance from said first side; a sub-cabinet (7,10) mounted to said cabinet and disposed in said opening in said second longitudinal side for supporting said reflector, said sub-cabinet being movable between a first mounted position and a second mounted position, said second position disposing said reflector to reflect said projected image onto said first surface of said screen, wherein a first distance between said first longitudinal side and a distal portion of said sub-cabinet farthest from said first longitudinal side when said sub-cabinet is in said first position is substantially equal to said predetermined distance and a second distance between said first longitudinal side and the distal portion of said sub-cabinet when said sub-cabinet is in said second position is substantially greater than said first distance, said sub-cabinet having means to cover said opening when said sub-cabinet is in said second position.
Claim 2
Dependent Claim
260 words
A video signal projection device, comprising: a projection tube (1) for projecting an image contained in a video signal; a screen (5) having a first surface onto which said image is projected and a second surface facing in a direction opposite to said first surface for visibly displaying said image for a viewer to observe; a reflector (4) for reflecting said projected image onto said first surface of said screen; a generally rectangular cabinet (6) for containing said projection tube, said cabinet having a first longitudinal side for supporting said screen and a second longitudinal side in which an opening is provided, said second longitudinal side being opposite to said first longitudinal side and being spaced a predetermined distance from said first side; a sub-cabinet (7,10) mounted to said cabinet and disposed in said opening in said second longitudinal side for supporting said reflector, said sub-cabinet being movable between a first mounted position and a second mounted position, said second position disposing said reflector to reflect said projected image onto said first surface of said screen, wherein a first distance between said first longitudinal side and a distal portion of said sub-cabinet farthest from said first longitudinal side when said sub-cabinet is in said first position is substantially equal to said predetermined distance and a second distance between said first longitudinal side and the distal portion of said sub-cabinet when said sub-cabinet is in said second position is substantially greater than said first distance, said sub-cabinet having means to cover said opening when said sub-cabinet is in said second position.
Claim 3
Dependent Claim
22 words
A video signal projective device as recited in claim 1, wherein said projection tube is a television projection tube receiving television signals.
Claim 4
Dependent Claim
31 words
A video signal projection device as recited in claim 1, further comprising a hinge between said cabinet and said sub-cabinet about which said sub-cabinet rotates between said first and second positions.
Claim 5
Dependent Claim
31 words
A video signal projection device as recited in claim 3, wherein said hinge comprises at least one pin attached to said sub-cabinet rotatably fitted into two holders attached to said cabinet.
Claim 6
Dependent Claim
33 words
A video signal projection device as recited in claim 3, wherein said hinge comprises two slots formed in said sub-cabinet and two hooks attached to said sub-cabinet onto which said slots are inserted.
Claim 7
Dependent Claim
25 words
A video signal projection device as recited in claim 3, further comprising fastening means for fastening said sub-cabinet to said cabinet in said first position.
Claim 8
Dependent Claim
18 words
A video signal projection device as recited in claim 6, wherein said fastening means are threaded fastening means.
Claim 9
Dependent Claim
27 words
A video signal projection device as recited in claim 7, further comprising second threaded fastening means for fastening said sub-cabinet to said cabinet in said second position.
Claim 10
Dependent Claim
81 words
A video signal projection device as recited in claim 1, wherein said projection tube is disposed so as to project said image onto said reflector, said cabinet further including third and fourth sides which oppose one another and join said first and second sides, and a top and a bottom which oppose one another and are connected to all of said sides, and wherein said sides, said top and said bottom together are disposed to prevent light from entering said cabinet.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-11-16 | 1991-05-18 | 1991-11-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-11-16 | 1995-05-18 | 1995-11-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-11-16 | 1999-05-18 | 1999-11-17 | $7700.00 | Window Closed / Lapsed |